- Author
-
Kuchta, J. M.
|
Cato, R. J.
|
Martindill, G. H.
|
Spolan, I.
- Title
- Ignition and Fire Suppression in Aerospace Vehicles. Technical Report. January 1, 1970-November 30, 1971.
- Coporate
- Bureau of Mines, Pittsburgh, PA
- Sponsor
- Air Force Aero Propulsion Lab., Wright-Patterson AFB, OH
- Report
-
AFAPL-TR-71-93; PMSRC Report 4164,
December 1971,
49 p.
- Distribution
- Available from National Technical Information Service
- Contract
- F33615-69-M-5002
- Keywords
-
ignition
|
fire suppression
|
aircraft fuel tanks
|
fire prevention
|
fuel tanks
|
halogen compounds
|
hydrocarbons
|
fire extinguishers
|
exploding wires
|
toxicity
|
burning rate
|
aircraft fires
- Identifiers
- suppression
- Abstract
- Several halogenated hydrocarbons were evaluated as possible ignition or explosion suppressants for aircraft fuel tanks in which ignitions are initiated by incendiary ammunition. The inhibitors included Halons 2402 (C2F4Br2), 1301 (CF3Br), 1202 (CF2Br2), 1211 (CF2ClBr), and 1011 (CH2ClBr). Their effectiveness in retarding igiition or propagaion of n-pentane-air mixtures was investigated with heated wires, exploding wires, and an incendiary composition. Large-scale experiments were conducted with Halon 1301 to determine its effectiveness and toxicity hazard in extinguishing Class A fires by the total flooding mode. A 6 percent Halon concentration was adequate for rapid extinguishment of cotton sheeting, paper sheeting, and nylon-paper sheeting fires. The toxic product formation varied with preburn time, combustible loading, and the extinguisher discharge mode. In addition, similar data are presented from small-scale experiments with Halon 38 (C3F8), which is less effective than Halon 1301 as an extinguishant.